William h



(ModeL) W. IIVTAYLOR.

ARTIFICIAL TOOTH.

MN T m .m J w fix M I J.

UNITE STATES PATENT OFFICE.

WILLIAM H. TAYLOR, RICHMOND, VIRGINIA. ASSIGNOR, BY .MESNE ASSIGNMENTS, TO THE S. S. WHITE DENTAL MANUFACTURING COMPANY, OF PHILADELPHIA, PENNSYLVANIA.

ARTIFICIAL TOOTH.

SPECIFICATION forming part of Letters Patent No; 278,468, dated May 29, 1883.

Application filed September 29. 1881. tModel.)

To all whom it may concern.- 3 Be it known that I, WILLIAM H. TAYLOR ot' Richmonrhin ,the county of Henrico and State of Virginia, have invented certain new and useful Improvements in Artificial Teeth or Tooth-Crowns, of which the following is a specification.

My invention relates to an improvement in artificial teeth and crowns Its object is,first, to combine a pivot and a plate-tooth in one structure,so organized thatitcau beapplied to .anatural root which has beendenuded of its crown or'to'the usual plate with ease and with the requirement of but little skill on the part ofthe operator to secure good results; second, to provide an improved crown for application to natnraLteeth roots whileinthen'Iouth, which will permit of nice fitting, ready application,

and secure attachment of the crown to the root; third, to provide an improved meth- 0d of setting or applying artificial crowns to naturalteeth roots while in the mouth.

The subject-matter claimed herein as of my invention is particularly pointed out at the close of the specification.

In the accompanying drawings, Figure 1 is a perspective jview of one of my improved teeth and crowns on an enlarged scale. Fig. 2 is a rear elevation thereof, showing the crown applied to a natural root or fang; and

- Fig. 3 isa longitudinal section through the root, anchoring post, crown, and backing thereof. I

My improved, crown A may be made of any suitable material, preferably that commonly employed in the construction of artificial teeth m the outer surface of which conforms to the and crowns, known in the art as porcelain. These crowns consist more properly of shells,

shape of thenatural teeth, the crowns of which the artificial crowns are to replace.

My improvements are more especially designed for application to incisor and cuspid teeth. The back of the crown is provided with a vertical groove or recess, a, for the reception of the end of a post, B, which projects from the natural root, the post being suitably secured in an opening made in the root in well-known ways. The back of the crownis alsoprovided, inaddition to the post-receiving 5o groove or channel a, with pits or holes a, one or I more, as may be desired, for a purpose which will hereinafter be explained. The rear face of the crown is also provided with pins (0 located one or more on each side of the postreceiving groove a, the pins beingso coustructed, as shown in Fig. 1, that they maybe bent or pinched around the anchoring-post when fitted in the groove of the crown, so as to lock the crown and post together, and consequently also look the crown to the root, as clearly shown in Figs. 2 and 3.

In applying my improved crowns to toothroots, the adjacent edges of the crown and root are of course suitably prepared, so as to 6 ration of the root, securing of the post therein, and fitting of the crown to the root and lockingthe crown by means of the pinching or clinching of the aforesaid pins to said. post the operation is completed by applying a cement or amalgam or a backing of gold or other filling to the back of the crown, so as to envelop the post and locking-pins a and give contour and smoothness to the lingual side of the tooth. The amalgam or cement is applied, as usual,

in a fluid or plastic condition, and is pressed or forced, not only to compactly surround the anchoring-post and locking pins before described, but also to flow into the retainingpits or recesses a, before described, whereby additional secu'rity'is afforded by more securely, locking the crown to the root upon the setting or hardening of the cement or amalgam, and also by more securely locking the cement or amalgam to the back of the crown and upon I the .root. By means of the amalgam or equiv alent backing a tight joint is madefortheprotection of the root from decay by reason of the 0 action of thefluids of the mouth, .&c. The artificial crown is preferably formed with a .thin curved lower end, as shown, to fit a concave or curve seat formed in the front edge of the root, as clearly shown in the drawings. 5 Without elaborating the advantages of my improvements andtheir capability as respects ease in fitting and setting the crown, I would have it understood that I do not claim as my invention anything shown or described in this application which is substantially similar to matter shown and described in Henry Westons application, filed October 7, 1881 but What 1 do claim herein is- 1. An artificial tooth-crown provided on its lingual surface with a vertical groove for the reception of the anchoring-post in the natural root, and with extended projecting pins on each side of said groove to be bent around the post to secure the crown in position, substantially as described.

2. An artificial tooth-crown consisting of a shell provided atitshack with a vertical groove, an additional interlocking pit or pits, and projecting pins capable of being bent around an anchoring-post, substantially as described.

3. The method of applying artificial toothcrowns to natural roots in the month, which consists in securing an anchoring-post in the root, fitting to said root an artificial crown having projecting pins at its back, and then bending said pins around said post to secure a firm connection, substantially as described.

4. The method of applying artificial toothcrowns to natural roots in the month, which consists in securing an anchoring-post in the root, fitting to said root an artificial crown having projecting pins at its back, bending said pins around said post to secure a firm connection, and then investing said pins and post with material to complete the setting of the crown, substantially as described.

In testimony whereof I affix my signature in presence of two witnesses.

WM. H. TAYLOR.

Witnesses: F. A. LEHMANN, W. H. KERN. 

